RoobetDone practising? Roobet has a free demo lobby and a 100% bonus up to $1,000 with code roospins.Crash Simulator
Play unlimited free rounds with real crash math and an animated curve. Test auto-cashout, Martingale and Paroli without risking a cent.
Open tool →Crash Predictor
See the true probability of any multiplier, your expected streaks, and why "predictor apps" can’t beat provably fair seeds.
Open tool →Bonus & Rakeback Calculator
Work out what a deposit bonus or rakeback deal is really worth on crash wagering before you deposit.
Open tool →What each crash tool does
The Crash Simulator is a full crash game with play money. You set a stake, an auto-cashout and a house edge, press Play and watch the multiplier climb on an animated curve until it crashes. It uses the same formula the real casinos use (multiplier = (100 − edge) / (100 × r), with r drawn uniformly), so the distribution of rounds you see is the distribution you will meet with real money. Switch to Martingale, Paroli or Fibonacci, fast-forward a hundred rounds and look at the bankroll chart: that is the fastest way to understand why “double after a loss” feels great for an hour and then empties the account.
The Crash Predictor is a probability calculator, not a prediction app. Enter a target multiplier and it returns the exact chance a round reaches it at your house edge, the expected number of wins over the rounds you plan to play, the typical longest losing streak you should budget for, and the expected result in money. It also contains a seed verifier: paste a revealed server seed and it recomputes the crash point so you can check a past round yourself.
The Bonus & Rakeback Calculator answers the question every crash player asks before depositing: is this offer actually worth clearing? It takes the match percentage, the cap, the wagering requirement and how much crash contributes, then prices the bonus against the expected cost of the wagering at your edge. Flip it to rakeback mode and it shows what a 10%, 15% or 70% rakeback deal returns on a month of volume and what your effective house edge becomes.
How to use them together
Start with the predictor to pick a cashout multiplier you can live with: 2x gives you a win roughly every other round at 1% edge, 10x once in ten. Then open the simulator, set that multiplier as your auto-cashout and run a few hundred rounds with the stake you would really use. If the bankroll chart shows drawdowns you would not tolerate, lower the target or the stake. Finally, before you sign up anywhere, put the casino’s bonus terms into the calculator and compare it with a rakeback deal; on a 1% edge game, rakeback often wins over a match bonus with 35x wagering.
Why we built these
Most “crash tools” online are either paid predictors that cannot predict anything or thin landing pages for affiliate links. We wanted three things we actually use: a simulator to test cashout strategies without spending crypto, a probability table so you know what a 10x shot really costs, and a calculator that says whether a bonus is worth clearing. Everything runs locally in your browser: no accounts, no tracking of your inputs, no data leaving the page.
What the tools cannot do
None of them can tell you the next multiplier. A provably fair round is fixed by the server seed before you bet, and the hash you see in advance only lets you verify it afterwards. Any app, Telegram group or “AI predictor” that claims otherwise is selling a coin flip. The honest value of these tools is different: they show you the odds, the variance and the price of a bonus so your decisions are made with numbers instead of a hunch. Read our guide on crash predictors if you are still tempted.
Where to play after practising
Our ranked list of crash gambling sites covers nine casinos we have played and withdrawn from. If you want the lowest house edge, start with the 1% sites (Stake, Shuffle, BC.Game); if you want the biggest lobby and a bonus that works on crash, Roobet with code roospins is our top pick.